Zigrat, you got it backwards, or your terminology is a bit confused.
You start graying out (gradually loosing sight in a tunnel-effect way) at about 3G and can black out (completely loose vision at 4G), but with any experience you can easily bump it up by a couple of Gs. If you have a reclining seat, like F16 or P51, even better, if you have a speciall G-suit, even more then that.
The G-loc means Gravity induced loss of conciousness.
Since your brain has a priority in getting the blood and a special systems to ensure it, and your eyes have no such thing, you loose sight much, much earlier then you loose conciousness.
From my personal experience, I was perfectly clear-headed and could do anything (control the plane, talk and hear, move my head and smile while being completely blacked out at less then 5Gs.
The flight sim should assume that we are experienced pilots and know the proper exercises to increase the G-tolerance.
It would be nice if they accounted for different seat angles and G-suit in different aircraft.
Also, a guy pulling on a low loaded stick of a P47 with a lot of leverage in a huge cockpit should blackout later then a guy in Bf109 with extremely stiff stick and tiny cockpit.
miko--
[This message has been edited by miko2d (edited 06-09-2000).]